* and purposes it's used space. Don't worry about locking the
* global_rsv, it doesn't change except when the transaction commits.
*/
- num_allocated += global_rsv->size;
+ if (sinfo->flags & BTRFS_BLOCK_GROUP_METADATA)
+ num_allocated += global_rsv->size;
/*
* in limited mode, we want to have some free space up to
if (num_bytes - num_allocated < thresh)
return 1;
}
- thresh = btrfs_super_total_bytes(root->fs_info->super_copy);
- /* 256MB or 2% of the FS */
- thresh = max_t(u64, 256 * 1024 * 1024, div_factor_fine(thresh, 2));
- /* system chunks need a much small threshold */
- if (sinfo->flags & BTRFS_BLOCK_GROUP_SYSTEM)
- thresh = 32 * 1024 * 1024;
-
- if (num_bytes > thresh && sinfo->bytes_used < div_factor(num_bytes, 8))
+ if (num_allocated + alloc_bytes < div_factor(num_bytes, 8))
return 0;
return 1;
}
return ret;
}
+static int can_overcommit(struct btrfs_root *root,
+ struct btrfs_space_info *space_info, u64 bytes,
+ int flush)
+{
+ u64 profile = btrfs_get_alloc_profile(root, 0);
+ u64 avail;
+ u64 used;
+
+ used = space_info->bytes_used + space_info->bytes_reserved +
+ space_info->bytes_pinned + space_info->bytes_readonly +
+ space_info->bytes_may_use;
+
+ spin_lock(&root->fs_info->free_chunk_lock);
+ avail = root->fs_info->free_chunk_space;
+ spin_unlock(&root->fs_info->free_chunk_lock);
+
+ /*
+ * If we have dup, raid1 or raid10 then only half of the free
+ * space is actually useable.
+ */
+ if (profile & (BTRFS_BLOCK_GROUP_DUP |
+ BTRFS_BLOCK_GROUP_RAID1 |
+ BTRFS_BLOCK_GROUP_RAID10))
+ avail >>= 1;
+
+ /*
+ * If we aren't flushing don't let us overcommit too much, say
+ * 1/8th of the space. If we can flush, let it overcommit up to
+ * 1/2 of the space.
+ */
+ if (flush)
+ avail >>= 3;
+ else
+ avail >>= 1;
+
+ if (used + bytes < space_info->total_bytes + avail)
+ return 1;
+ return 0;
+}
+
/*
* shrink metadata reservation for delalloc
*/
writeback_inodes_sb_nr_if_idle(root->fs_info->sb, nr_pages,
WB_REASON_FS_FREE_SPACE);
+ /*
+ * We need to wait for the async pages to actually start before
+ * we do anything.
+ */
+ wait_event(root->fs_info->async_submit_wait,
+ !atomic_read(&root->fs_info->async_delalloc_pages));
+
spin_lock(&space_info->lock);
- if (space_info->bytes_used + space_info->bytes_reserved +
- space_info->bytes_pinned + space_info->bytes_readonly +
- space_info->bytes_may_use + orig <=
- space_info->total_bytes) {
+ if (can_overcommit(root, space_info, orig, !trans)) {
spin_unlock(&space_info->lock);
break;
}
}
if (ret) {
- u64 profile = btrfs_get_alloc_profile(root, 0);
u64 avail;
/*
goto again;
}
- spin_lock(&root->fs_info->free_chunk_lock);
- avail = root->fs_info->free_chunk_space;
-
- /*
- * If we have dup, raid1 or raid10 then only half of the free
- * space is actually useable.
- */
- if (profile & (BTRFS_BLOCK_GROUP_DUP |
- BTRFS_BLOCK_GROUP_RAID1 |
- BTRFS_BLOCK_GROUP_RAID10))
- avail >>= 1;
-
- /*
- * If we aren't flushing don't let us overcommit too much, say
- * 1/8th of the space. If we can flush, let it overcommit up to
- * 1/2 of the space.
- */
- if (flush)
- avail >>= 3;
- else
- avail >>= 1;
- spin_unlock(&root->fs_info->free_chunk_lock);
-
- if (used + num_bytes < space_info->total_bytes + avail) {
+ if (can_overcommit(root, space_info, orig_bytes, flush)) {
space_info->bytes_may_use += orig_bytes;
trace_btrfs_space_reservation(root->fs_info,
"space_info", space_info->flags, orig_bytes, 1);
return 0;
}
-void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv)
+void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type)
{
memset(rsv, 0, sizeof(*rsv));
spin_lock_init(&rsv->lock);
+ rsv->type = type;
}
-struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root)
+struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
+ unsigned short type)
{
struct btrfs_block_rsv *block_rsv;
struct btrfs_fs_info *fs_info = root->fs_info;
if (!block_rsv)
return NULL;
- btrfs_init_block_rsv(block_rsv);
+ btrfs_init_block_rsv(block_rsv, type);
block_rsv->space_info = __find_space_info(fs_info,
BTRFS_BLOCK_GROUP_METADATA);
return block_rsv;
void btrfs_free_block_rsv(struct btrfs_root *root,
struct btrfs_block_rsv *rsv)
{
+ if (!rsv)
+ return;
btrfs_block_rsv_release(root, rsv, (u64)-1);
kfree(rsv);
}
struct btrfs_block_rsv *src_rsv = get_block_rsv(trans, root);
struct btrfs_block_rsv *dst_rsv = &pending->block_rsv;
/*
- * two for root back/forward refs, two for directory entries
- * and one for root of the snapshot.
+ * two for root back/forward refs, two for directory entries,
+ * one for root of the snapshot and one for parent inode.
*/
- u64 num_bytes = btrfs_calc_trans_metadata_size(root, 5);
+ u64 num_bytes = btrfs_calc_trans_metadata_size(root, 6);
dst_rsv->space_info = src_rsv->space_info;
return block_rsv_migrate_bytes(src_rsv, dst_rsv, num_bytes);
}
ret = block_rsv_use_bytes(block_rsv, blocksize);
if (!ret)
return block_rsv;
- if (ret) {
+ if (ret && !block_rsv->failfast) {
static DEFINE_RATELIMIT_STATE(_rs,
DEFAULT_RATELIMIT_INTERVAL,
/*DEFAULT_RATELIMIT_BURST*/ 2);
projects / cascardo / linux.git / blobdiff